Advanced Program-to-Program Communication

What Does Advanced Program-to-Program Communication Mean?

Advanced Program-to-Program Communications (APPC) is a protocol used by applications to communicate with each other over a network. APPC works in the application layer of the OSI model. It enables communication between programs from desktop computers and other devices such as mobile devices and midrange computers.

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Techopedia Explains Advanced Program-to-Program Communication

APPC serves as a translator between partner applications over a network. When one application needs to send data, the APPC software receives this data, processes it, sends it over a network adapter and then sends the data over the network. The data is received by another network adapter and is given back to the APPC software, which translates the data back to its original form before handing it to the corresponding partner application.

The standard was initiated by IBM to provide services for transaction processing. APPC is now used as a general purpose mechanism for running distributed computing infrastructures and services.

APPC is linked with Logical Unit Type 6.2 (LU 6.2), which was developed to allow networked computer systems with their own processing power to create their own sessions. When first introduced, APPC was a major strategy change for IBM. It shifted network control from centralized hosts to individual systems.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.